Routing information Protocol (RIP)

Routing information Protocol (RIP)

Hello friends,

Welcome to our website and today we are going to discuss about network RIP Protocol (Routing information Protocol)

  1. RIP is a dynamic routing Protocol
  2. RiIP is a distance vector routing protocol

Distance: How far away the distance is from the source means it keep record of the hop count.

Vector: Which directions, in routing word we are about which interface and the IP-address of the next router it send it to.

Distance vector routing is also referred as ROUTING BY RUMOUR.

  • RIP is application layer protocol and it uses UDP PORT No – 520
  • RIP uses concept of update to share their routing table to the neighboring routers and these updates are periodic in nature.
  • RIP versions:
  • RIPV1: send update on broadcast address i.e
  • RIPV2: send updates on multicast address i.e
  • RIPng: RIP next generation.
  • RIP is a classless routing protocol by default means RIP don’t carry subnet mask with their routing updates.
  • RIP supports maximum15 hop counts.
  • AD value of RIP = 120.
  • Metric in RIP = hop Count.
  • RIP uses the bellman-Ford Distance Vector algorithm to determine the best “path” to a particular destination.

RIP Timers:

  1. Update : 30 seconds
  2. Invalid Timer: 180 Seconds
  3. Hold-Down Timer: 180 Seconds
  4. Flush Timer: 240 seconds

RIP Loop Avoidance Mechanism:

  1. Split-Horizon: It states that if a router receives any update from an interface, then it will not send the same update from that particular interface, in order to prevent loops in the topology. Split-horizon is enable by default on cisco Routers.
  2. Rote- Poisoning – whenever, a network goes down on a router, then an update is sent out of all the interface with an infinity metric for that network. Metric=16 in RIP indicates that the route goes down.
  3. Hold-Down Timer: Prevent RIP from accepting any new updates for router in a hold-down state, until the hold-down timer expires.

Drawbacks of RIP:

  1. It is not a scalable protocol.
  2. Slow convergence.
  3. It sends periodic update after every 30 sec which result in consumption of link bandwidth.
  4. Pin-hole congestion.

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